EP0480087A1 - Basslautsprechersystem - Google Patents

Basslautsprechersystem Download PDF

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Publication number
EP0480087A1
EP0480087A1 EP90119419A EP90119419A EP0480087A1 EP 0480087 A1 EP0480087 A1 EP 0480087A1 EP 90119419 A EP90119419 A EP 90119419A EP 90119419 A EP90119419 A EP 90119419A EP 0480087 A1 EP0480087 A1 EP 0480087A1
Authority
EP
European Patent Office
Prior art keywords
acoustic pipe
air chamber
low sound
loudspeaker
loudspeaker system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP90119419A
Other languages
English (en)
French (fr)
Inventor
Junichi Hayakawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kenwood KK
Original Assignee
Kenwood KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kenwood KK filed Critical Kenwood KK
Priority to EP90119419A priority Critical patent/EP0480087A1/de
Publication of EP0480087A1 publication Critical patent/EP0480087A1/de
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2853—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line
    • H04R1/2857—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
    • H04R1/2819—Enclosures comprising vibrating or resonating arrangements of the bass reflex type for loudspeaker transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2838—Enclosures comprising vibrating or resonating arrangements of the bandpass type
    • H04R1/2842—Enclosures comprising vibrating or resonating arrangements of the bandpass type for loudspeaker transducers

Definitions

  • the acoustic pipe is adapted to communicate with the air chamber via an aperture of the acoustic pipe. Therefore, high sound components generated by the loudspeaker unit are attenuated by the filtering effect of the air chamber.
  • sounds radiated from the back side 2a of the loudspeaker unit 2 and guided via the acoustic pipe 4 to the aperture 8 formed at the other end 4c have low sound components, at the aperture 8, of approximately the opposite phase to the phase at the back side 2a and of approximately the same frequency where the half wavelength stands in the acoustic pipe 4 of the low sound loudspeaker system.
EP90119419A 1990-10-10 1990-10-10 Basslautsprechersystem Withdrawn EP0480087A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP90119419A EP0480087A1 (de) 1990-10-10 1990-10-10 Basslautsprechersystem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP90119419A EP0480087A1 (de) 1990-10-10 1990-10-10 Basslautsprechersystem

Publications (1)

Publication Number Publication Date
EP0480087A1 true EP0480087A1 (de) 1992-04-15

Family

ID=8204599

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90119419A Withdrawn EP0480087A1 (de) 1990-10-10 1990-10-10 Basslautsprechersystem

Country Status (1)

Country Link
EP (1) EP0480087A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256343A (en) * 1991-05-29 1992-12-02 Hughes Aircraft Co High efficiency low frequency speaker system
WO1997008916A1 (en) * 1995-08-25 1997-03-06 Britannia Investment Corporation Improved bass-reflex loudspeaker
CN1062681C (zh) * 1994-05-09 2001-02-28 株式会社日立制作所 显示设备
GB2408676A (en) * 2003-12-05 2005-06-08 Peter Roots Loudspeaker stand with resonating tube

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2224919A (en) * 1937-03-31 1940-12-17 Rca Corp Loud-speaker
DE3214226A1 (de) * 1982-04-17 1983-10-20 Standard Elektrik Lorenz Ag, 7000 Stuttgart Lautsprecher mit schallumwegleitung
US4875546A (en) * 1988-06-02 1989-10-24 Teledyne Industries, Inc. Loudspeaker with acoustic band-pass filter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2224919A (en) * 1937-03-31 1940-12-17 Rca Corp Loud-speaker
DE3214226A1 (de) * 1982-04-17 1983-10-20 Standard Elektrik Lorenz Ag, 7000 Stuttgart Lautsprecher mit schallumwegleitung
US4875546A (en) * 1988-06-02 1989-10-24 Teledyne Industries, Inc. Loudspeaker with acoustic band-pass filter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 8, no. 39 (E-228)[1476], 21st February 1984; & JP-A-58 196 797 (MATSUSHITA K.K.) 16-11-1983 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2256343A (en) * 1991-05-29 1992-12-02 Hughes Aircraft Co High efficiency low frequency speaker system
CN1062681C (zh) * 1994-05-09 2001-02-28 株式会社日立制作所 显示设备
WO1997008916A1 (en) * 1995-08-25 1997-03-06 Britannia Investment Corporation Improved bass-reflex loudspeaker
US5696357A (en) * 1995-08-25 1997-12-09 Polk Investment Corporation Bass-reflex loudspeaker
GB2408676A (en) * 2003-12-05 2005-06-08 Peter Roots Loudspeaker stand with resonating tube
GB2408676B (en) * 2003-12-05 2009-01-07 Peter Roots Hifi speaker stand

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19921016

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KABUSHIKI KAISHA KENWOOD

17Q First examination report despatched

Effective date: 19940413

STAA Information on the status of an ep patent application or granted ep patent

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RAP3 Party data changed (applicant data changed or rights of an application transferred)

Owner name: KABUSHIKI KAISHA KENWOOD

18W Application withdrawn

Withdrawal date: 19940811